# 停用防火墙
systemctl disable firewalld
systemctl stop firewalld

# 设置系统时间
export TIME_STYLE='+%Y-%m-%d %H:%M:%S'
source /etc/profile

# 设置源
cd /etc/yum.repos.d/ && mkdir backup && mv *repo backup/ 
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-8.repo
sed -i -e "s|mirrors.cloud.aliyuncs.com|mirrors.aliyun.com|g " /etc/yum.repos.d/CentOS-*
sed -i -e "s|releasever|releasever-stream|g" /etc/yum.repos.d/CentOS-*
yum clean all && yum makecache

# 配置docker源
sysctl -w net.ipv4.tcp_keepalive_time=600
sysctl -w net.ipv4.tcp_keepalive_intvl=30
sysctl -w net.ipv4.tcp_keepalive_probes=10
yum install yum-utils device-mapper-persistent-data lvm2 -y
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

yum remove buildah -y